The CMD837 1.0 GHz to 18.0 GHz highpass / lowpass diplexer is an ideal solution when RF modulation or DC injection is essential. Each of the channels is comprised of a seven section Chebychev filter. The individual filters are diplexed to provide for a common port that passes DC to 500 MHz and 1.0 GHz to 18.0 GHz. The low frequency port allows for injection of a DC to 500 MHz bias, or control signal onto the 1.0 GHz to 18.0 GHz band. The diplexing function of the filter provides -30 dB of isolation channel to channel.

  • Size: 1.50” L x 0.80” W x 0.50” H
  • Lowpass Range: DC - 500 MHz
  • Highpass Range: 1.0 GHz - 18.0 GHz
  • Return Loss: -10 dB min (Highpass and Lowpass)
  • Insertion Loss: 1.25 dB (Highpass)
  • Allowable current: 100 milliamps at 12 Volts

Low Channel (DC Bias/Injection Band)

  • DC – 500 MHz

High Channel (RF Band)

  • 1.0 – 18.0 GHz

Insertion Loss

  • 0.7 dB max (DC – 500 MHz)
  • 1.25 dB max (1.0 – 18.0GHz)

High to Low Channel Isolation

  • -30dB min DC – 500 MHz

Low to High Channel Isolation

  • -30dB min 1.0 – 18.0 GHz

Return Loss

  • DC – 500 MHz -10.0 dB min
  • 1.0 – 18.0 GHz -10.0 dB min


  • 1.50” L x 0.80” W x 0.50” H


  • 50Ω


  • SMA Female

Operating Temperature

  • -40° to +70°C

Recent Events

June 19, 2017 - June 21, 2017
Baltimore Convention Center & Hilton Hotel
United States
The Information Assurance Symposium (IAS) will take place from 19th June to the 21st June 2017 at the Baltimore Convention Center & Hilton Hotel. IAS is the premier NSA information assurance event, providing an opportunity for guests to learn and network from cyber security professionals, subject matter experts and solution providers from throughout Government, industry and academia.
June 4, 2017 (All day) - June 9, 2017 (All day)
United States
The IEEE MTT International Microwave Symposium (IMS) is the premier annual international meeting for technologists involved in all aspects of microwave theory and practice. It consists of a full week of events, including technical paper presentations, workshops, and tutorials, as well as numerous social events and networking opportunities. The symposium also hosts a large commercial exhibition. Co-located with IMS are the IEEE RFIC and ARFTG conferences.